Re: [CF-metadata] seeking CF name for total water column height
Dear All, I think a new Standard Name 'sea_floor_depth_below_sea_surface' is what's needed here. My definition for this would be 'The vertical distance between the sea surface and the seabed at a given point in space and at a given instant in time or averaged over a time interval that is significantly less than a tidal cycle (1 hour or less).' This may seem complicated, but is needed to cover BPRs which do some averaging to smooth out waves. My take on 'height_above_sea_floor' would be as the z co-ordinate for something inside a water body. May be worth pointing out to Jeff that there is already 'sea_water_pressure_at_sea_floor' for BPR data that haven't been converted to depth. I've expressed this as a depth rather than as a height to be consistent with 'sea_floor_depth_below_sea_level' and so we don't end up with different terms for the same quantity depending upon whether one is looking upwards or downwards. Cheers, Roy. -Original Message- From: cf-metadata-boun...@cgd.ucar.edu [mailto:cf-metadata-boun...@cgd.ucar.edu] On Behalf Of Jeff deLaBeaujardiere Sent: 26 January 2010 22:22 To: cf-metadata@cgd.ucar.edu Cc: Mike Garcia Subject: [CF-metadata] seeking CF name for total water column height Hello- I am a new subscriber. We are hoping to adopt CF names wherever possible in the context of the Integrated Ocean Observing System (IOOS) Sensor Observation Services (SOS). Not all phenomena we measure have immediately apparent CF names, however. We are using this URL as a reference: http://cf-pcmdi.llnl.gov/documents/cf-standard-names/standard-name-table/current/cf-standard-name-table.html The first example is total water column height as derived from a bottom pressure recorder associated with a tsunami warning buoy. This is not sea_surface_height_above_reference_ellipsoid or _above_sea_level. It might be height_above_sea_floor but we're not really sure what that refers to (height of what?). Is there a standard name present or planned that is equivalent to total_water_column_height? Thanks for any information, Jeff DLB -- Jeff de La Beaujardière, PhD Senior Systems Architect, Data Integration Framework Integrated Ocean Observing System (IOOS) Program Office National Oceanic and Atmospheric Administration 1100 Wayne Ave #1225, Silver Spring MD 20910 USA +1 301 427 2427 jeff.delabeaujardi...@noaa.gov ___ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata -- This message (and any attachments) is for the recipient only. NERC is subject to the Freedom of Information Act 2000 and the contents of this email and any reply you make may be disclosed by NERC unless it is exempt from release under the Act. Any material supplied to NERC may be stored in an electronic records management system. ___ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
Re: [CF-metadata] seeking CF name for total water column height
Hello Roy, Hello Jeff, Just to feed the debate: that in CF table there is also the quantity 'sea_surface_height_above_geoid'. That could be a possibility too, I think? Cheers, Olivier. -Message d'origine- De : cf-metadata-boun...@cgd.ucar.edu [mailto:cf-metadata-boun...@cgd.ucar.edu] De la part de Lowry, Roy K Envoyé : mercredi 27 janvier 2010 09:58 À : Jeff deLaBeaujardiere; cf-metadata@cgd.ucar.edu Cc : Mike Garcia Objet : Re: [CF-metadata] seeking CF name for total water column height Dear All, I think a new Standard Name 'sea_floor_depth_below_sea_surface' is what's needed here. My definition for this would be 'The vertical distance between the sea surface and the seabed at a given point in space and at a given instant in time or averaged over a time interval that is significantly less than a tidal cycle (1 hour or less).' This may seem complicated, but is needed to cover BPRs which do some averaging to smooth out waves. My take on 'height_above_sea_floor' would be as the z co-ordinate for something inside a water body. May be worth pointing out to Jeff that there is already 'sea_water_pressure_at_sea_floor' for BPR data that haven't been converted to depth. I've expressed this as a depth rather than as a height to be consistent with 'sea_floor_depth_below_sea_level' and so we don't end up with different terms for the same quantity depending upon whether one is looking upwards or downwards. Cheers, Roy. -Original Message- From: cf-metadata-boun...@cgd.ucar.edu [mailto:cf-metadata-boun...@cgd.ucar.edu] On Behalf Of Jeff deLaBeaujardiere Sent: 26 January 2010 22:22 To: cf-metadata@cgd.ucar.edu Cc: Mike Garcia Subject: [CF-metadata] seeking CF name for total water column height Hello- I am a new subscriber. We are hoping to adopt CF names wherever possible in the context of the Integrated Ocean Observing System (IOOS) Sensor Observation Services (SOS). Not all phenomena we measure have immediately apparent CF names, however. We are using this URL as a reference: http://cf-pcmdi.llnl.gov/documents/cf-standard-names/standard-name-table/current/cf-standard-name-table.html The first example is total water column height as derived from a bottom pressure recorder associated with a tsunami warning buoy. This is not sea_surface_height_above_reference_ellipsoid or _above_sea_level. It might be height_above_sea_floor but we're not really sure what that refers to (height of what?). Is there a standard name present or planned that is equivalent to total_water_column_height? Thanks for any information, Jeff DLB -- Jeff de La Beaujardière, PhD Senior Systems Architect, Data Integration Framework Integrated Ocean Observing System (IOOS) Program Office National Oceanic and Atmospheric Administration 1100 Wayne Ave #1225, Silver Spring MD 20910 USA +1 301 427 2427 jeff.delabeaujardi...@noaa.gov ___ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata -- This message (and any attachments) is for the recipient only. NERC is subject to the Freedom of Information Act 2000 and the contents of this email and any reply you make may be disclosed by NERC unless it is exempt from release under the Act. Any material supplied to NERC may be stored in an electronic records management system. ___ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata Cliquez sur l'url suivante https://www.mailcontrol.com/sr/XSF3ayfb92zTndxI!oX7UtTXwRoU2H8X9MZg!!X+6h5uo0A89Yts6hMrboLqIZ6d9r4ZDktgx4ejfskgLULbMA== si ce message est indésirable (pourriel). ___ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
Re: [CF-metadata] seeking CF name for total water column height
Any particular reason that you are biased for this name representing only a short-term value? Seems to me there is equally the need for a (measured or modeled) value that would be defined exactly the same way, but without the time qualifiers. In general, when CF has a measured observable, the name makes no statement about whether the variable has been measured instantaneously, or for 1 hour, or for one month. It's time-neutral. This has several advantages. I suggest either the same principle be applied here, or that the possibility of the longer-time-frame name be accommodated by adding a qualifier to the name associated with this definition. John On Jan 27, 2010, at 00:58, Lowry, Roy K wrote: Dear All, I think a new Standard Name 'sea_floor_depth_below_sea_surface' is what's needed here. My definition for this would be 'The vertical distance between the sea surface and the seabed at a given point in space and at a given instant in time or averaged over a time interval that is significantly less than a tidal cycle (1 hour or less).' This may seem complicated, but is needed to cover BPRs which do some averaging to smooth out waves. My take on 'height_above_sea_floor' would be as the z co-ordinate for something inside a water body. May be worth pointing out to Jeff that there is already 'sea_water_pressure_at_sea_floor' for BPR data that haven't been converted to depth. I've expressed this as a depth rather than as a height to be consistent with 'sea_floor_depth_below_sea_level' and so we don't end up with different terms for the same quantity depending upon whether one is looking upwards or downwards. Cheers, Roy. -Original Message- From: cf-metadata-boun...@cgd.ucar.edu [mailto:cf-metadata-boun...@cgd.ucar.edu ] On Behalf Of Jeff deLaBeaujardiere Sent: 26 January 2010 22:22 To: cf-metadata@cgd.ucar.edu Cc: Mike Garcia Subject: [CF-metadata] seeking CF name for total water column height Hello- I am a new subscriber. We are hoping to adopt CF names wherever possible in the context of the Integrated Ocean Observing System (IOOS) Sensor Observation Services (SOS). Not all phenomena we measure have immediately apparent CF names, however. We are using this URL as a reference: http://cf-pcmdi.llnl.gov/documents/cf-standard-names/standard-name-table/current/cf-standard-name-table.html The first example is total water column height as derived from a bottom pressure recorder associated with a tsunami warning buoy. This is not sea_surface_height_above_reference_ellipsoid or _above_sea_level. It might be height_above_sea_floor but we're not really sure what that refers to (height of what?). Is there a standard name present or planned that is equivalent to total_water_column_height? Thanks for any information, Jeff DLB -- Jeff de La Beaujardière, PhD Senior Systems Architect, Data Integration Framework Integrated Ocean Observing System (IOOS) Program Office National Oceanic and Atmospheric Administration 1100 Wayne Ave #1225, Silver Spring MD 20910 USA +1 301 427 2427 jeff.delabeaujardi...@noaa.gov ___ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata -- This message (and any attachments) is for the recipient only. NERC is subject to the Freedom of Information Act 2000 and the contents of this email and any reply you make may be disclosed by NERC unless it is exempt from release under the Act. Any material supplied to NERC may be stored in an electronic records management system. ___ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata -- I have my new work email address: jgrayb...@ucsd.edu -- John Graybeal mailto:jgrayb...@ucsd.edu phone: 858-534-2162 System Development Manager Ocean Observatories Initiative Cyberinfrastructure Project: http://ci.oceanobservatories.org Marine Metadata Interoperability Project: http://marinemetadata.org ___ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
Re: [CF-metadata] seeking CF name for total water column height
I have no concern about whether this stream needs labeling. My concern is whether you are defining something in the definition which is in no way described by the label, and which will prevent that label being used for other variables in other streams. Put another way, what should the models that calculate the nominal sea_floor_depth_below_sea_surface -- or an averaged value longer than 1 hour -- call their values? John On Jan 27, 2010, at 12:54, Lowry, Roy K wrote: Hi John, Simple pragmatism. It's what a BPR data stream tends to contain and so it needs labelling. Cheers, Roy. From: John Graybeal [jbgrayb...@mindspring.com] Sent: 27 January 2010 16:41 To: Lowry, Roy K Cc: Jeff deLaBeaujardiere; cf-metadata@cgd.ucar.edu; Mike Garcia Subject: Re: [CF-metadata] seeking CF name for total water column height Any particular reason that you are biased for this name representing only a short-term value? Seems to me there is equally the need for a (measured or modeled) value that would be defined exactly the same way, but without the time qualifiers. In general, when CF has a measured observable, the name makes no statement about whether the variable has been measured instantaneously, or for 1 hour, or for one month. It's time-neutral. This has several advantages. I suggest either the same principle be applied here, or that the possibility of the longer-time-frame name be accommodated by adding a qualifier to the name associated with this definition. John On Jan 27, 2010, at 00:58, Lowry, Roy K wrote: Dear All, I think a new Standard Name 'sea_floor_depth_below_sea_surface' is what's needed here. My definition for this would be 'The vertical distance between the sea surface and the seabed at a given point in space and at a given instant in time or averaged over a time interval that is significantly less than a tidal cycle (1 hour or less).' This may seem complicated, but is needed to cover BPRs which do some averaging to smooth out waves. My take on 'height_above_sea_floor' would be as the z co-ordinate for something inside a water body. May be worth pointing out to Jeff that there is already 'sea_water_pressure_at_sea_floor' for BPR data that haven't been converted to depth. I've expressed this as a depth rather than as a height to be consistent with 'sea_floor_depth_below_sea_level' and so we don't end up with different terms for the same quantity depending upon whether one is looking upwards or downwards. Cheers, Roy. -Original Message- From: cf-metadata-boun...@cgd.ucar.edu [mailto:cf-metadata-boun...@cgd.ucar.edu ] On Behalf Of Jeff deLaBeaujardiere Sent: 26 January 2010 22:22 To: cf-metadata@cgd.ucar.edu Cc: Mike Garcia Subject: [CF-metadata] seeking CF name for total water column height Hello- I am a new subscriber. We are hoping to adopt CF names wherever possible in the context of the Integrated Ocean Observing System (IOOS) Sensor Observation Services (SOS). Not all phenomena we measure have immediately apparent CF names, however. We are using this URL as a reference: http://cf-pcmdi.llnl.gov/documents/cf-standard-names/standard-name-table/current/cf-standard-name-table.html The first example is total water column height as derived from a bottom pressure recorder associated with a tsunami warning buoy. This is not sea_surface_height_above_reference_ellipsoid or _above_sea_level. It might be height_above_sea_floor but we're not really sure what that refers to (height of what?). Is there a standard name present or planned that is equivalent to total_water_column_height? Thanks for any information, Jeff DLB -- Jeff de La Beaujardière, PhD Senior Systems Architect, Data Integration Framework Integrated Ocean Observing System (IOOS) Program Office National Oceanic and Atmospheric Administration 1100 Wayne Ave #1225, Silver Spring MD 20910 USA +1 301 427 2427 jeff.delabeaujardi...@noaa.gov ___ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata -- This message (and any attachments) is for the recipient only. NERC is subject to the Freedom of Information Act 2000 and the contents of this email and any reply you make may be disclosed by NERC unless it is exempt from release under the Act. Any material supplied to NERC may be stored in an electronic records management system. ___ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata -- I have my new work email address: jgrayb...@ucsd.edu -- John Graybeal mailto:jgrayb...@ucsd.edu phone: 858-534-2162 System Development Manager Ocean Observatories Initiative Cyberinfrastructure Project: http://ci.oceanobservatories.org Marine Metadata Interoperability Project: http://marinemetadata.org -- This message (and any attachments) is for the
